杏吧原创

Others take this idea too seriously, as with 鈥淪ix Degrees of Hematology鈥�,
which asks students to link two seemingly unconnected statements through at
least five pathophysiological steps. For haemophiles, that鈥檚 at
http://hms.medweb.harvard.edu/HS_Heme/Degrees/sixdgre3.htm.